JPS55117521A - Press bending and spinning method - Google Patents

Press bending and spinning method

Info

Publication number
JPS55117521A
JPS55117521A JP2347679A JP2347679A JPS55117521A JP S55117521 A JPS55117521 A JP S55117521A JP 2347679 A JP2347679 A JP 2347679A JP 2347679 A JP2347679 A JP 2347679A JP S55117521 A JPS55117521 A JP S55117521A
Authority
JP
Japan
Prior art keywords
blank holder
bed
spite
clearance
thickness
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2347679A
Other languages
Japanese (ja)
Inventor
Yuzuru Morikawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Lighting Ltd
Original Assignee
Hitachi Lighting Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Lighting Ltd filed Critical Hitachi Lighting Ltd
Priority to JP2347679A priority Critical patent/JPS55117521A/en
Publication of JPS55117521A publication Critical patent/JPS55117521A/en
Pending legal-status Critical Current

Links

Landscapes

  • Bending Of Plates, Rods, And Pipes (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

PURPOSE: To restrict generation of wrinkle and deformation in spite of severe working conditions, and to greatly improve the workability, by holding the clearance between the blank holder and the bending bed a little larger than the thickness of material, and by smoothing the slip-in of material during the work.
CONSTITUTION: The clearance tO between the blank holder 4 and the bending bed 7 for pinching the material 11 is made a little larger than thickness (t) of the sheet 11 of material 1 in spite of the pushing action of the blank holder 4. That is, the coned disc spring 12 is inserted into the lower holder 8 for supporting the bed 7; and the spacer pin 13 permitted to strike the blank holder 4 is supported by the spring 12 so as to project out of the bed 7 upward. The blank holder 4 is pushed down to strike the pin 13, and the clearance tO is held a little larger than thickness (t) by the elastic force of the spring 12 in spite of the pushing action of the blank holder 4. As a result, at pressing the material 11 with the bending punch 6, the slip- in of material 11 can be smoothed, so that the material 11 is prevented from generation of cracks, etc.
COPYRIGHT: (C)1980,JPO&Japio
JP2347679A 1979-03-02 1979-03-02 Press bending and spinning method Pending JPS55117521A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2347679A JPS55117521A (en) 1979-03-02 1979-03-02 Press bending and spinning method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2347679A JPS55117521A (en) 1979-03-02 1979-03-02 Press bending and spinning method

Publications (1)

Publication Number Publication Date
JPS55117521A true JPS55117521A (en) 1980-09-09

Family

ID=12111577

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2347679A Pending JPS55117521A (en) 1979-03-02 1979-03-02 Press bending and spinning method

Country Status (1)

Country Link
JP (1) JPS55117521A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100436994B1 (en) * 2001-05-17 2004-06-23 주식회사 씨솔루션 Device for manufacturing a tab of beverage can
CN106513457A (en) * 2016-11-09 2017-03-22 宝钛集团有限公司 Preparation method for near-beta titanium alloy disc spring

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100436994B1 (en) * 2001-05-17 2004-06-23 주식회사 씨솔루션 Device for manufacturing a tab of beverage can
CN106513457A (en) * 2016-11-09 2017-03-22 宝钛集团有限公司 Preparation method for near-beta titanium alloy disc spring

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